the Snowboarders crampon!
The flexlock Petzl Vasak's are the best fitting crampons i have found for snowboard boots. I've had problems with both blackdiamond contact strap/neve strap crampons as they don't come up the back of the boot high enough. Making for risky situations when your crampon slips off mid climb! Not an option! The strap system on these petzl's accommodate snowboard boots much better in my opinion. The back part of the strap comes up the boot about 4.5" which makes for a really solid hold.
These things strap down so snug and tight- Snowboarders in need of crampons, look no further!
(burton serow boot pictured-size 10.5)